Error type: "Forbidden". Error message: "Requests from referer are blocked." Domain: "global". Reason: "forbidden".

Did you added your own Google API key? Look at the help.

Check in YouTube if the id PL4h_iy1mm6czG39Cl-ppOeFNLzbZiuEcf belongs to a playlist. Check the FAQ of the plugin or send error messages to support.

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